Download

Source Code

You can download the latest stable version, distributed under the GNU General Public License:
Download Polyphemus, version 1.11.1 (2019-08-02), about 3MB of compressed archive (see below for quick installation).

In order to be kept informed of the release of a new version or a patch, you are recommended to subscribe to our announcement mailing list (low traffic) at the polyphemus-user subscription page.

You can also clone the Git repositories of Polyphemus at:
http://gitlab.com/polyphemus
Please use the following script to clone all sub-projects. Cloning Polyphemus

Note these correspond to the latest version of Polyphemus, which may be unstable.

Documentation

User

You are strongly advised to download and read Polyphemus User's Guide. This is the main documentation and the starting point for beginners. It describes the installation.

A short install guide (in French) is also available.

A reference documentation for AtmoPy has been generated using Epydoc. You are invited to browse it online.

The main parameterizations in use are described in AtmoData scientific documentation. In addition, this document briefly describes transport and scavenging in Polair3D and Gaussian models.

Developer

For developers:

Browse SeldonData documentation online , or download it;
Browse AtmoData documentation online , or download it (the documentation available for download also contains the documentation for Fortran routines);
Browse AtmoData documentation for Fortran routines .

Installation

The first step is to expand the archive you downloaded:

    tar xjvf Polyphemus-[version].tar.bz2

This will create a directory named Polyphemus-[version].

The library AtmoPy makes calls to a C++ program called extract_configuration. You need to compile it using scons to have AtmoPy fully installed:

    cd Polyphemus-[version]/include/atmopy/talos
    scons

For almost every program, instead of makefiles, SConstruct files are provided (further informations about SCons and our support for it are given in the user's guide). Please read the user's guide to perform a complete installation.

To test the whole system, refer to the test cases on this website (Polair3D, Gaussian and Castor test cases).

Release Notes

From version 1.11 (2018/09/29) to version 1.11.1 (2019/08/02):

Processing
- Added "transport (polair3d)": for a dispersion simulation, we have used "photochemisty" processing and the option "With_chemistry: no". This new "transport" processing allows to launch a dispersion simulation with minimal configuration options. (Palmira Messina).
- Added "plume-in-grid-tracer": with the same idea above "transport", this new coupled processing combines "Polair3DTransport" and "GaussianPuffTransport" models to launch a dispersion simulation using a sub-grid plume-in-grid approach (Yelva Roustan).
Models
- Updated Aerosol-SCRAM-SOAP (Karine Sartelet)
  - H2O is updated to better represent ELVOC (Extremely Low-Volatility Organic Compounds) and organic nitrate.
- Updated plume-in-grid-aerosol (Valentin Raffort)
  - SOAP is set to the default SOA model in plume-in-grid-aerosol
  - Added Forward_Gaussian in "PlumeInGridAerosol.cxx" that is called only if rank = 0. For a parallelized simulation, Forward of GaussianPuff models was called by all processes leading to an unnessary CPU time increase.
  - Added a new option "Save_Gaussian_concentrations". Mass in puffs had been systemically injected in the corresponding grids at the moment of saving
  - Corrected the computation of interaction volume of puffs to avoid a negative overlap_volume.
Bug fixed
- Default arguments in template are removed to meet C++ standard in "Seldon" library included for "preprocessing/coagulation-coef" program needs. The following error message was obtained "redeclaration of 'void Seldon::Vector::Write(std::ostream&, bool) const' may not have default arguments".
- Functions in AtmoData and SeldonData are corrected for compatibility to C++11. "is_empty" function has beed used in AtmoData and SeldonData. "is_empty" is included in C++11 as a intrinsic function. (Alban Farchi)
Development environment
- Minor correction for compatibility with Intel compiler.

From version 1.10 (2018/04/10) to version 1.11 (2018/09/29):

Models
- Added street-network model MUNICH and Street-in-Grid models (Youngseob Kim).
- Coupled SCRAM aerosol model with SOAP (Youngseob Kim).

From version 1.9.2 (2017/08/11) to version 1.10 (2018/04/10):

Models
- Added SOAP SOA model (Youngseob Kim).
- Added SCRAM aerosol model (Shupeng Zhu).
- Removed SIREAM-AEC 3D version.
- Modifications in PinG (Valentin Raffort).
- Renamed Aerosol module AEC to H2O.
Bug fixes
- When we use the compile flag profile=debug, we got a compile error using gcc-4.6 (the version we tested). This is the issue of the backtrace library which is available in gcc-4.8 or later.
- SeldonData: SetNaN and InitData should be carefully revised. They are currently unused because of a conflict with Resize function.
- Add ifcore in scons/scons_ext/utils.py for Intel compiler.

From version 1.9.1 (2015/09/08) to version 1.9.2 (2017/08/11):

Models
- Added the number calculation of aerosol (Stephaine Deschamps).
Bug fixes
- In Mozart4 preprocessing:
  - the vertical axis was inverted when computing the concentrations for sea salt (SS), dust (DU) and areosol species (AERO),
  - the speciation coefficients were not taken into account for computing the concentrations.
- In MEGAN preprocessing, fixed a memory bug (an array index was out of range).
- In WRF preprocessing, the configuration files were not read correctly.
- Made the SPACK generator compatible with older versions of Python (<2.7) and GFortran (<4.4).
- In the SIREAM SORGAM aerosol model, the reaction rates were computed with wrong physical units.
- Refactored the TRY/CATCH macros to always display exception specific message.
Development environment
- In the regression tests, improved the display of the differences between simulation results.

From version 1.9 (2015/04/20) to version 1.9.1 (2015/09/08):

Models
- Added a 0D version of the SIREAM aerosol model:
  - adaptated the current 3D SIREAM model to 0D,
  - added the Polair3D simulation program "polair3d-siream-h2o".
- Added aerosol modelization to the Gaussian puff model:
  - added volume source and water content,
  - integration of the 0d SIREAM aerosol model,
  - added the "gaussian-aerosol" program.
- Extended the plume-in-grid model for aerosol modeling:
  - coupled the plume-in-grid model with the aerosol Gaussian puff model,
  - added the "plume-in-grid-aer" program.
Preprocessing
- Added Mozart4 preprocessing programs for border and initial conditions.
- Added MACC aerosol boundary conditions preprocessing programs.
Bug fixes
- In SIREAM aerosol model:
  - adaptative time step was misconputed,
  - BiPER degradation was not updated.
- In the plume in grid with lineic Gaussian modelisation:
  - N sources were computed N*N times,
  - OH and NO chemistry could not be disabled.
Development environment
- Added automatic installation of WGrib and Gtest libraries and automatic Lua detection.
- Added "install_polyphemus", "build_polyphemus" and "test_polyphemus" scripts to streamline development process.

From version 1.8.1 (2010-12-02) to version 1.9 (2015/04/20):

Preprocessing
- Added MEGAN biogenic emission preprocessing with the "bio-megan" program.
- Added support for GLC 2000 in "luc-glcf".
- Added the lattitude/longitude projection to the WRF meteo processing.
- Added the FastJX photolysis rates scheme in the WRF and MM5 meteo processing.
- Added the computation of the cloud top height, renaming the former cloud height to cloud base height.
Aerosol
- Implemented support for organic aerosol formation in Siream-AEC.
- Added new biogenic precursors and explicitly NOx regime in Siream-SORGAM.
- Added experimental support for the FastJX photolysis rates scheme in Siream-SORGAM.
- Included the Spack library, with automatic generation of chemical mechanism by SCons.
- Updated RACM, RAMC2 and CB05 mechanism.
- Updated Isorropia patches to support OpenMP parallelism (work in progress).
Models
- Added lineic Gaussian modelisation for road traffic simulations:
  - implemented the discretized lineic Gaussian sources,
  - made it compatible with the "plume in grid" model for multi-scale simulations,
  - parallelized the "plume in grid" model for line sources using MPI.
- Improved scavenging computations:
  - added Belot parameterization for in-cloud scavenging,
  - split below-cloud and in-cloud scavenging so that both may be applied at the same time,
  - took into account the depth of the clouds.
Data assimilation
- Greatly improved data assimilation and observation management, using the Verdandi library.
Bug fixes
- Numerous bug fixes, among which:
  - in MPI parallelization, MPI_init was not always called,
  - numerous fixes in scavenging computations,
  - when using 'Polair3DAerosol' with 'Decay' volume emissions for particulate species were added twice,
  - when reading LUC input data from USGS, abscissa and ordinate axis were inverted,
  - negative concentrations could be encountered with the programs "plume" and "plume_aer" when negative wind angles were used for the line sources,
  - in the Gaussian plume model, combination factor was reset for line sources after the discretization.
Development tools
- Made the source code compatible with newer gcc versions, up to gcc-5 witout OpenMP, and gcc-4.8 when using OpenMP.

From version 1.7.4 (2010-06-16) to version 1.8.1 (2010/12/02):

Modules
- Overhauled the gazeous chemistry modules, added the CB05 and RACM2 mechanisms and updated the RACM species data: the module 'Photochemistry' replaces and extends the former 'ChemistryRACM' module. It can use the chemical mechanisms RACM, RACM2 and CB05. In the related configuration files, the field 'option_chemistry' has been added with three possible values 'RACM', 'RACM2' and 'CB05'. The field 'Photolysis_option' has also been added and offer the choice to compute the photolysis rates from tabulations or read them from binary files.
Aerosol
- Overhauled the aerosol modules to add the chemical mechanisms RACM2 and CB05. Species data have also been updated for the RACM mechanism.
- In the 'SIMPLE_AQUEOUS' model of the aerosol modules, added the same redistribution process as in the 'VSRM' model.
- Improved the stability of the aerosol thermodynamics module ISORROPIA.
Gaussian models
- In the model 'GaussianPlume', improved the line source model:
  - added corrective terms for receptors that are downwind the source and at extremities of the source when the source stability class is 'D',
  - modified the threshold for the line source / discretized source combination,
  - added the line source correction for the different stability classes,
  - improved the initialization of the standard deviation.
Preprocessing
- Added species data files related to the chemical mechanisms RACM2 and CB05 and used in preprocessing programs. Also updated the same species data for the chemical mechanisms RACM.
- Improved "luc-usgs" to handle more precisely output grids whose resolution are as high as the input grid of LUC.
- Modified the "discretization" program: segments of a broken line are now modelled with half source points at their vertices and extremities.
Bug fixes
- Negative concentrations could be encountered with the programs "plume" and "plume_aer" when negative wind angles were used for the line sources.
- With the driver 'PlumeDriver', when "coordinates_list" was the first saver unit type, others saver units with a different type were wrongly managed.
- In the library 'AtmoData', the total number of LUC cells at the boundary of the computational domain was erroneous in 'GridCorrespondences'.

From version 1.7 (2010-05-07) to version 1.7.4 (2010-06-16):

Bug fixes
- The initial and final times provided to the gaseous chemistry solvers of 'ChemistryRACM', 'ChemistryRADM', 'AerosolRACM_SIREAM' and 'AerosolRACM_SIREAM_AEC' could be improperly modified when using the default photolysis rates because a related temporary variable was not systematically initialized.
- Within the aerosol modules 'AerosolRACM_SIREAM' and 'AerosolRACM_SIREAM_AEC', the initial and final times provided to the gaseous chemistry solvers could be improperly modified during the computation of the zenithal angles when using the default photolysis rates.
- The initial and final times provided to the gaseous chemistry solvers of 'ChemistryRACM' and 'ChemistryRADM' could be improperly modified during the computation of the zenithal angles when using the default photolysis rates.
- In the module 'AerosolRACM_SIREAM_AEC', some UNIFAC parameters were erroneously initialized.

From version 1.6 (2009-11-13) to version 1.7 (2010-05-07):

General
- Improved the management of plume rise parameters for point sources. In the configuration files for point sources, 'Diameter' replaces 'Section'.
- Extended the parallelization to:
  - the module 'ChemistryRADM' with MPI and OpenMP,
  - the driver 'OptimalInterpolationDriver' with MPI.
Gaussian models
- In the model 'GaussianPlume', added the possibility to have an initial sigma for line sources.
- In the model 'GaussianPuff', simplified the computation of loss processes, in particular dry deposition with Chamberlain model.
- Added the reflection factor for the model 'PuffChemistry', to allow computation of the dry deposition with the Overcamp model in case there is in-puff chemistry.
Aerosol
- Updated UNIFAC parameters and chemical surrogates representation.
- Improved the computational efficiency of the module 'AerosolRACM_SIREAM_AEC'.
Driver
- In the driver 'MonteCarloDriver', added:
  - support for a model parallelized with MPI,
  - the ability to save in a file the generated random numbers,
  - support for a perturbation of the wind angle.
Preprocessing
- Modified the program 'discretization' to have half sources at extremities of a segment.
Plume-in-grid model
- Added the loss processes.
Bug fixes
- The modules 'ChemistryRACM', 'ChemistryRADM', 'AerosolRACM_SIREAM' and 'AerosolRACM_SIREAM_AEC' failed to integrate over a time step whose initial and final dates were in two different years.
- In the module 'AerosolRACM_SIREAM_AEC', the configuration file section '[saturation_pressure_mass]' could be misread.
- In the library 'AtmoData':
  - an error in the function 'LonLatToWRFLccInd' resulted in an offset in the Lcc projection of 'WRF-meteo'.
  - the function 'ComputeAttenuation_LWC' miscalculated the attenuation when clouds reached the upper model level.
- In the model 'GaussianPlume', when several line sources were used, the line source and the discretized source were not working when combined together.
- Memory leak problems could arise with the 'GaussianPuff' model.

From version 1.5 (2009-05-20) to version 1.6 (2009-11-13):

General
- Overhauled the parallelization
  - the MPI parallelization of the modules 'ChemistryRACM' and 'SplitAdvectionDST3' was simplified and the modules 'DiffusionROS2', 'AerosolRACM_SIREAM' and 'AerosolRACM_SIREAM_AEC' have been parallelized with MPI,
  - the modules 'ChemistryRACM', 'SplitAdvectionDST3', 'DiffusionROS2', 'AerosolRACM_SIREAM' and 'AerosolRACM_SIREAM_AEC' have also been parallelized with the shared memory parallel model of OpenMP,
  - patches of the external module 'ISORROPIA' have been added to comply with the OpenMP parallelization of 'AerosolRACM_SIREAM' and 'AerosolRACM_SIREAM_AEC'.
- Added two SCons options for the command line
  - to set up the C compiler, and
  - to compile with the OpenMP and/or the MPI parallelization library.
Preprocessing
- Added support for WRF, with "meteo/WRF-meteo.cpp".
Lagrangian stochastic models
- Added the model 'LagrangianTransport' to solve stochastically the advection-diffusion of gaussian kernel particles. For the particles, 'Horker' and 'Fokker-Planck' formulations have been implemented.
Gaussian models
- Added support for continuous line sources in the model 'GaussianPlume'.
- Modified the program "discretization.cpp".
  - Now, several independant segments can be discretized, in addition to a single broken line.
  - The emission rate (or quantity) must now be specified per unit of length, in mass/s/m (resp. mass/m).
  - The number of points to discretize each segment now includes the segment nodes.
Aerosol
- For the module 'AerosolRACM_SIREAM', added a patch for ISORROPIA 1.7 (2009-05-27) to be applied if the OpenMP parallelization is used.
- For the module 'AerosolRACM_SIREAM_AEC', added a new patch for the last release of ISORROPIA 1.7 (2009-05-27).
- For the modules 'AerosolRACM_SIREAM' and 'AerosolRACM_SIREAM_AEC', added the display option "Show_configuration".
Bug fixes
- When compiling a program using an aerosol module, the SCons command line option "nacl" was implicitly always set to "yes".
- In the module 'SplitAdvectionDST3', the boundary conditions on the lowest and highest levels were not correctly assigned.
- In the preprocessing program MM5-meteo, results were shifted with an offset of 0.5 cell.
- The programs polair3d-decay, polair3d-siream, polair3d-siream-aec and puff_aer could encounter a segmentation fault when compiled with recent versions of GNU GCC (posterior to 4.3).
- In the simple aqueous submodule of the module 'AerosolRACM_SIREAM', the sulfate concentrations were wrongly computed because of a sign error.
- The program compute_tab that computes the Mie tabulation for the postprocessing program optics could abort with a segmentation fault.
- In the model 'Polair3DAerosol', some configuration checkings were not performed.
- In the module 'AerosolRACM_SIREAM', 'option_adaptive_time_step' was not always explicitly initialized.

From version 1.4 (2008-11-20) to version 1.5 (2009-05-20):

General
- Added the Python module 'ensemble_generation'.
Preprocessing
- "meteo" and "attenuation" were not able to treat properly ECMWF data created after 2006-02-02. The size of the table containing the hybrid coefficients was indeed supposed to be always equal to 61. Now, this size is determined directly from the actual file "hybrid_coefficients.dat".
- Introduced a new parameterization to compute the critical relative humidity in the program "attenuation".
- In the programs "gaussian_deposition" and "gaussian_deposition_aer", added an option "file" to read the coefficients and deposition velocities in a file with all meteorological situations (examples are "deposition.dat" and "scavenging.dat"). Also added a keyword "Velocity_part" in the configuration file, to mention whether the diffusive or total part of the deposition velocity is given. In the case it is "diffusive", the gravitational settling velocity is computed.
- Modified the programs "discretization" and "discretization_aer" to match the changes in the point sources management: now there can be a list of species, along with a list of corresponding rates or quantities.
- Added the ability to multiply the boundary layer height by a constant in the Troen & Mahrt parameterization.
Driver
- Modified the perturbation scheme so that fields with two values per step ('_i' and '_f') are properly handled in 'AssimilationDriver', 'PerturbationManager' and 'MonteCarloDriver'.
- In the drivers 'EnKFDriver', 'RRSQRTDriver' and 'MonteCarloDriver', introduced a more complete re-initialization before any call to the model's integration over one time step. This may be needed for the model to behave properly.
Gaussian models
- Added an option for subcycling of chemistry in 'GaussianPuff'.
- Added an option to save the total plume mass in a binary file.
Plume-in-grid model
- Added an alternative method to take into account background concentrations for puff chemistry with the plume-in-grid model (option "With_chemistry_feedback").
- Added an alternative method to take into account background concentrations for puff chemistry with the plume-in-grid model (option "With_chemistry_feedback").
Other models
- Added the option of adaptive time stepping for RACM, RACM-SIREAM and RACM-SIREAM-AEC gaseous chemistry.
- In 'Polair3DTransport', 'Polair3DChemistry' and 'Polair3DAerosol', moved the computation and the transformation of a few fields from 'InitStep' to 'Forward' so that more raw input fields may be perturbed.
- The aerosol module 'AerosolRACM_SIREAM' now supports parallel computing. Corrected and updated parallel computing for the aerosol module 'AerosolRACM_SIREAM_AEC'.
- In the aerosol modules, the increments of bulk concentrations computed by VSRM are now distributed among sections proportionally to the initial particle distribution.
Postprocessing
- Initial import of class 'Source' and several related functions useful to display point sources in AtmoPy.
- Added functions 'fac2', 'fac5', 'nmse_1', 'mg', 'vg' and 'fmt'. Renamed 'nmse' to 'rnmse_2' in AtmoPy.
Bug fixes
- In the aerosol module 'AerosolRACM_SIREAM', the redistribution of concentrations in the sections after the aqueous phase computation was not correct.
- Significant differences in the results of the parallelized and serialized versions of programs including the model 'Polair3DChemistry' were encountered when the source splitting method was used. In the parallelized version, data useful to this method were not scattered properly throughout the parallel processes.
- 'InCloudWetDepositionFlux' and 'InCloudWetDepositionFlux_aer' were badly taken into account when parallel computing was used in the aerosol modules.
- When parallelized jobs of "polair3d-siream" or "polair3d-siream-aec" were terminated abnormally, shared memory segments were not properly deleted. Then, the user was not able to relaunch a similar job on the same machine. System ressources were also wasted.
- In the Gaussian puff model, when there was plume rise with the puff above the boundary layer, the standard deviations were computed at the wrong height.
- In the plume-in-grid model, the puff transfer was wrongly done when the puff was above the boundary layer.
- "optics" failed to read properly the OPAC files when they were preprocessed as indicated the user's guide, i.e. when '#' was replaced by ''.
- In the plume-in-grid model, puffs reaching the end of the simulation domain were improperly handled.
- WGRIB was requested in order to compile any program in "preprocessing/meteo/" although only "attenuation" and "meteo" need it.

From version 1.3.1 (2008-05-30) to version 1.4 (2008-11-20):

General
- Replaced the directory "driver/" with:
  - the directory "include/driver/" where the drivers are now located, and
  - the directory "processing/" where several examples are given with their configuration files.
- Wrote a new support for SCons with improved portability and many options.
- Implemented constraints on the values read in the configuration file(s).
- Renamed the makefiles of Polyphemus to indicate the related compiler.
- Added "utils/check_observation".
- Improved the script "utils/format" so that the formatted files are no more overwritten in case no change was made in them.
Gaussian models
- Added support of plume rise in the Gaussian puff model.
- Added chemistry for gaseous species in the Gaussian puff model (RACM mechanism).
- Added more plume rise formulae to use in the Gaussian plume/puff model.
- Added an alternative formula to compute the plume/puff standard deviations above the boundary layer.
- Added an alternative formula to compute the plume/puff standard deviations for elevated sources, in the case similarity theory is used.
- Gaussian models now use the point emission manager common to all models for gaseous species. The source configuration files slightly change. The Gaussian puff model automatically discretizes a continuous source into a series of puff, with a specified time step.
- Added the option "spatial_average" for the saver type "coordinates_list": it allows to save the averaged value over a given volume around the point instead of the exact concentration. This is relevant for Gaussian and plume-in-grid models.
Other models
- Added chemistry for gaseous species in the plume-in-grid model (RACM mechanism).
- In the plume-in-grid model, the mass transfered in a cell is the exact puff integral over the cell volume instead of an approximation of it.
- In the plume-in-grid model, added a reading of LUC file in order to determine whether to use the urban or rural formulae when using the Briggs parameterization.
- Added a new type of point emissions: temporal emissions. They are like continuous emissions, but with temporal factors that are read in a binary file and applied to the emission rate every given time step.
Drivers
- Added support for parallel computing in 'BaseDriver'.
- Added 'PlumeMonteCarloDriver' for Monte Carlo simulations with a Gaussian plume model. An example called "uncertainty-plume" is provided in "processing/gaussian/".
- Added 'PerturbationDriver' that allows to perturb input fields in a model.
- Strongly sped up 'OptimalInterpolationDriver'.
- In 'OptimalInterpolationDriver', added the ability to produce an analysis before the first simulation step (that is, with the initial conditions).
Modules
- 'SplitAdvectionDST3' and 'ChemistryRACM' now support parallel computing.
Preprocessing
- Corrected weekdays factors in a data file used by "emissions".
Bug fixes
- In 'SplitAdvectionDST3::Forward': the number of subcycles along z was taken as that along y.
- In the computation of the Lagrangian vertical time scale, the input parameters where taken in the wrong order in 'ComputeVerticalSigma'.
- The model behaved as if the photolysis data contained one level less than it actually has. In other words, the top altitude in the photolysis input data was simply ignored.
- In 'GaussianPlume::InitMeteo', the inversion height was determined with an uninitialized stability class.
- In 'GroundObservationManager::ReadStation', the paths to the station files could include unwanted trailing spaces.
- In 'SaverUnitDomain_assimilation::Init', the initial date could not be written in the "date file", even if an analysis was saved at that date.

Previous releases

Source
- Polyphemus, version 1.10 (2018-04-10)
- Polyphemus, version 1.9.2 (2017-08-11)
- Polyphemus, version 1.9.1 (2015-09-08)
- Polyphemus, version 1.9 (2015-04-20)
- Polyphemus, version 1.8.1 (2010-12-02)
- Polyphemus, version 1.7.4 (2010-06-16)
- Polyphemus, version 1.7.3 (2010-06-04)
- Polyphemus, version 1.7.2 (2010-05-31)
- Polyphemus, version 1.7.1 (2010-05-27)
- Polyphemus, version 1.7 (2010-05-07)
- Polyphemus, version 1.6 (2009-11-13)
- Polyphemus, version 1.5 (2009-05-20)
- Polyphemus, version 1.4 (2008-11-20)
- Polyphemus, version 1.3.1 (2008-05-30)
- Polyphemus, version 1.3 (2008-05-19)
- Polyphemus, version 1.2.2 (2007-12-20)
- Polyphemus, version 1.2.1 (2007-11-05)
- Polyphemus, version 1.2 (2007-10-18)
- Polyphemus, version 1.1.1 (2007-06-21)
- Polyphemus, version 1.1 (2007-05-09)
- Polyphemus, version 1.1 alpha (unstable!) (2007-03-27)
- Polyphemus, version 1.0.1 (2006-12-14)
- Polyphemus, version 1.0 (2006-10-16)
- Polyphemus, version 0.2.1 (2005-09-01)
- Polyphemus, version 0.2(2004-10-13)
Documentation

Polyphemus

Air Quality Modeling System